Why were some enslaved Africans motivated to join the British in the American Revolution

Many African Americans, both enslaved and free, wanted to join with the Patriots. They believed that they would achieve freedom or expand their civil rights. In addition to the role of soldier, Black men also served as guides, messengers, and spies.

2018 means 2018 ce or common era

there have been other eras too including bce, which included way more years.

social contract theory, nearly as old as philosophy itself, is the view that persons' moral and/or political obligations are dependent upon a contract or agreement among them to form the society in which they live